There’s a can of frosting in the cabinet that’s been there for a few weeks, or a container of homemade buttercream from last weekend still sitting in the fridge. Is the frosting going bad?
Short answer: Yes, but how fast depends entirely on the type.
An unopened can of store-bought frosting lasts up to 18 months in the pantry. Homemade cream cheese frosting should be refrigerated immediately and used within two weeks. Buttercream made with just butter and powdered sugar can be kept at room temperature for up to two days. The type of frosting determines how you should store everything.
To see how pantry staples and perishable foods compare in shelf life, visit our The Complete Guide to Food Storage.
To take the keys
- Store-bought canned goods (unopened): Shelf-stable between 12 and 18 months.
- Store-bought canned goods (opened): refrigerate and use within 3 to 4 weeks.
- Homemade American Buttercream (butter and powdered sugar only): up to 2 days at room temperature; 2 weeks in the refrigerator; 3 months frozen.
- Cream Cheese Frosting: refrigerate immediately. Use within 2 weeks. The FDA 2-hour room temperature rule applies.
- Whipped cream frosting: refrigerate immediately. Use within 1 to 3 days.
- Royal ice cream (fully dried): It is shelf stable for weeks at room temperature.
How long does it take to freeze depending on the type?
The most important factor in the shelf life of the frosting is whether it contains perishable milks such as cream cheese, whipped cream or eggs. These ingredients determine whether the frosting can be refrigerated immediately or whether it can be kept for a day or two.
| Frosting type | Room temperature | the refrigerator | the freezer |
|---|---|---|---|
| Store-bought canned goods (unopened) | Pantry between 12 and 18 months | It is not necessary | Up to 3 months |
| Store-bought canned goods (open) | 2 hours maximum | 3 to 4 weeks | Up to 3 months |
| American buttercream (butter + powdered sugar) | up to 2 days | 2 weeks | Up to 3 months |
| Cream cheese frosting | 2 hours maximum | Up to 2 weeks | Up to 3 months |
| Whipped cream frosting | 1 to 2 hours maximum | 1 to 3 days | It is not recommended |
| Swiss or Italian meringue cream (egg white) | 1 to 2 days | Maximum 1 week | Up to 3 months |
| Royal icing (fully set and dry) | Several airtight weeks | Not required once set | It is not recommended |
Estimates based on proper storage in sealed containers. Expiry dates on commercial products indicate top quality, not safety cutoffs. Always check for signs of deterioration before use. consistent with USDA FoodKeeper guidelines for prepared foods containing dairy products.
Store-Bought Freezes: Until the pantry opens, then the fridge
Unopened cans of Betty Crocker, Pillsbury and similar brands are shelf stable thanks to their high sugar content and preservatives such as potassium sorbate. In a cool, dark pantry they can last 12 to 18 months without refrigeration. Once opened, the rules change. Exposure to air increases the risk of spoilage and the manufacturer’s recommendation on all major brands is to refrigerate after opening. Open store-bought frosting keeps in the refrigerator for 3 to 4 weeks in an airtight container. Tubes of icing for decorating are an exception: they can be left in the pantry after opening, as they become too stiff for the tubes in the fridge.
Homemade Frosting: The Type Determines Everything
Key distinction
American buttercream (butter and sugar) is the most forgiving. The high sugar content and no perishable milk other than butter (which is inherently stable for a short time at room temperature) means it can stay at room temperature for up to two days in a cool environment. America’s Test Kitchen confirms that a simple, no-cook buttercream with butter, sugar, and flavorings can keep for a couple of days. Refrigerate for up to two weeks. Freeze for up to three months.
Cream cheese frosting it’s a completely different story. The FDA It is recommended to refrigerate food made with cream cheese after 2 hours, including the time spent preparing it. Cream cheese is a soft dairy product with a high moisture content, which affects food safety at room temperature. Refrigerate the cream cheese frosting immediately and use within two weeks.
Whipped cream frosting it is the most perishable. Whipped cream begins to break down almost immediately at room temperature and in the refrigerator and should be consumed within 1-3 days.
Signs that frosting has gone bad
When to throw
Mold: Any visible mold growth, which can appear as faint spots of any color, prompts immediate disposal of the entire container. Do not try to pop the frosting around the mold.
Pungent or sour smell: Fresh frosting should smell sweet, buttery, or taste like its own. A musty, rancid, musty or otherwise unpleasant smell means the frost has gone bad. This is especially true for cream cheese or whipped cream frosting.
Significant color change: Darkening over time may be normal, but frost that has turned a significantly different color than when it was fresh indicates spoilage.
Separation or grainy texture: Some separation may occur during refrigeration and can be corrected by re-stirring. Frosts that remain lumpy or watery after re-stirring and have been stored for a long time are gone.
Apart from the flavors: Rancid butter produces a distinctly unpleasant taste. If the frosting tastes sour, bitter, or wrong, discard it.
Time: Either way, discard frozen cream cheese after two weeks in the refrigerator, store-bought frosting after four weeks open, and homemade buttercream two weeks in the refrigerator. Don’t just rely on the cream cheese frosting inspection.
Freezing: What Works and What Doesn’t
Most frostings freeze well except whipped cream. Butter and cream cheese frosting freezes for up to three months. Place in an airtight freezer container, press plastic wrap directly onto the surface of the frosting before sealing to prevent freezer burn, and label with type and date. Thaw overnight in the refrigerator and bring to room temperature before re-blending.
Whipped cream does not freeze properly. The entrained air collapses during freezing and thawing, leaving a watery, separated result. Make whipped cream frosting and use within days.
How to properly store frosts
Good storage practices
Know your type of ice before deciding where to store it. Cream cheese and whipped cream go into the fridge immediately. Buttercream can sit at room temperature briefly but is best chilled. Store-bought canned goods are pantry-stable until opened.
See also
Use an airtight container. Frost easily absorbs odors from the surrounding area, especially in the refrigerator. An airtight container prevents the frosting from tasting like what’s in the fridge. Press the plastic wrap directly onto the surface before sealing to prevent a crust from forming.
Label with type and date. Buttercream and cream cheese frosting look almost identical when stored in a container. A label takes the guesswork out of what it is and how long it’s been around.
Do not store in a jet with the tip cut off. An open bag allows the frost to dry quickly. Transfer unused frosting to a sealed container instead.
Bring the refrigerated frosting to room temperature before using. Cold buttercream is stiff and difficult to spread. Remove from the refrigerator 30-60 minutes before use. Knead again if necessary to restore a smooth, spreadable texture.
Recipes that use frosting
- Sugar-free cookie cutters: turns classic royal icing into iconic decorated cookies for any occasion
- Bunny Butt Cupcakes: buttercream frosting is incorporated into the white, grassy tails that make these cupcakes
- Lavender Cookies: A simple glaze icing finishes these delicate cookies with a light and sweet coating
- Sugar Free Cookies: decorated with a sugar-free icing that works like royal icing for beautiful cutting results
Frequently Asked Questions
Can I use store-bought frosting past its expiration date?
For unopened cans, yes, often in good time. Good freeze dates on canned goods indicate peak quality, not an immediate safety cut-off. An unopened can stored well in a cool, dark pantry is still good a few months after the date. Check for odors, mold, or noticeable changes in texture. If it looks and smells normal, it is safe to use. For open freezers that have cooled, use odor and mold tests beyond the date, and discard after four weeks.
Does the frosted cake need to be refrigerated?
It depends on the frost. An American buttercream (with butter and powdered sugar) frosted cake can be covered at room temperature for up to two days in a cool environment. Before serving, the cream cheese frosting should be cooled and brought to room temperature. The cake with whipped cream should be chilled and served within a day or two. When you refrigerate a frozen cake, cover it with a lid so that the frosting does not absorb the odors of the refrigerator and the cake does not dry out.
My buttercream frosting has been in the fridge for three weeks. Is it still good?
If it’s plain American buttercream made with butter and powdered sugar, it’s probably borderline. The recommended refrigeration window is two weeks for best quality. Do a smell and taste test. If it smells fresh and buttery rather than rancid and tastes normal, it’s likely still usable. If there is an unpleasant smell or taste, discard it. If the buttercream contains cream cheese, milk or eggs, skip it for three weeks without hesitation.
Further reading
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